良心云到期了，续费实在太贵，趁着双11买了一台99元一年的阿里云ecs，配置为223，简单够用，可以至少续费1年。

配置ECS

阿里云的系统自带的云防火墙，很占内存的，本来内存就不大，所以还是自己dd一台新的系统，我选择Ubuntu 20.04，需要注意的是，如果dd新的系统，那么网页后台的控制将有一大部分不能使用，比如监控的功能。

1. 配置安全组，打开22端口，以备ssh工具连接
   默认的22端口没有打开，需要打开22端口，好让工具链接到控制台。路径为ecs后台——配置安全组规则——配置规则
   
2. 配置root密码
   默认的密码我也不知道，重新配置即可，或者用自带的web ssh免密登录，然后修改。

dd重装系统

我使用的网络重装脚本是bin456789/reinstall: 又一个一键重装脚本 (github.com)

1. 安装脚本

# certutil -urlcache -f -split https://ghps.cc/https://raw.githubusercontent.com/bin456789/reinstall/main/reinstall.bat`

2. 安装Ubuntu 20.04
# bash reinstall.sh ubuntu20.04
   等待安装完成后登入系统root:123@@@
3. 配置软件源，更换为ecs自有源
   • 备份源，# cp /etc/apt/sources.list /etc/apt/sources.list.backup
   • 编辑源，把以下内容复制最开始位置
     # vim /etc/apt/sources.list

deb http://mirrors.cloud.aliyuncs.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.cloud.aliyuncs.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.cloud.aliyuncs.com/ubuntu/ focal-updates main restricted universe multiverse

4. 新增加用户，并配置sudo权限
   # adduser dawn
# usermod -aG sudo dawn

配置zsh和ohmyzsh

# 安装zsh
$ sudo apt install zsh

# 安装ohmyzsh
$ sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

# 配置root账户也能用同一份配置文件
$ sudo ln -s ~/.zshrc /root/.zshrc
$ sudo ln -s ~/.oh-my-zsh /root/.oh-my-zsh

# 配置常用插件git, z, zsh-autosuggestions, zsh-syntax-highlighting

# 安装zsh-autosuggestions
$ git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
# 安装zsh-syntax-highlighting
$ git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting
# 配置zshrc文件
# 修改.zshrc中的 plugins=(git z zsh-syntax-highlighting zsh-autosuggestions)

# 使配置文件生效
$ source .zshrc

安装docker

官方文档写的很好:Install Docker Engine on Ubuntu | Docker Docs

1. Set up Docker’s apt repository

# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

# Add the repository to Apt sources:
echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update 

2. Install the Docker packages

$ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

3. Verify that the Docker Engine installation is successful by running the hello-world image

$ sudo docker run hello-world